| 48e671d5 |
1 | /* |
| 2 | * fake library for ssh |
| 3 | * |
| 4 | * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror(). |
| 5 | * These funtions are defined in rfc2133. |
| 6 | * |
| 7 | * But these functions are not implemented correctly. The minimum subset |
| 8 | * is implemented for ssh use only. For exapmle, this routine assumes |
| 9 | * that ai_family is AF_INET. Don't use it for another purpose. |
| 10 | * |
| 11 | * In the case not using 'configure --enable-ipv6', this getaddrinfo.c |
| 12 | * will be used if you have broken getaddrinfo or no getaddrinfo. |
| 13 | */ |
| 14 | |
| 15 | #include "includes.h" |
| 16 | #include "ssh.h" |
| 17 | |
| 18 | #ifndef HAVE_GAI_STRERROR |
| 19 | char * |
| 20 | gai_strerror(ecode) |
| 21 | int ecode; |
| 22 | { |
| 23 | switch (ecode) { |
| 24 | case EAI_NODATA: |
| 25 | return "no address associated with hostname."; |
| 26 | case EAI_MEMORY: |
| 27 | return "memory allocation failure."; |
| 28 | default: |
| 29 | return "unknown error."; |
| 30 | } |
| 31 | } |
| 32 | #endif /* !HAVE_GAI_STRERROR */ |
| 33 | |
| 34 | #ifndef HAVE_FREEADDRINFO |
| 35 | void |
| 36 | freeaddrinfo(ai) |
| 37 | struct addrinfo *ai; |
| 38 | { |
| 39 | struct addrinfo *next; |
| 40 | |
| 41 | do { |
| 42 | next = ai->ai_next; |
| 43 | free(ai); |
| 44 | } while (ai = next); |
| 45 | } |
| 46 | #endif /* !HAVE_FREEADDRINFO */ |
| 47 | |
| 48 | #ifndef HAVE_GETADDRINFO |
| 49 | static struct addrinfo * |
| 50 | malloc_ai(port, addr) |
| 51 | int port; |
| 52 | u_long addr; |
| 53 | { |
| 54 | struct addrinfo *ai; |
| 55 | |
| 56 | if (ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) + |
| 57 | sizeof(struct sockaddr_in))) { |
| 58 | memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in)); |
| 59 | ai->ai_addr = (struct sockaddr *)(ai + 1); |
| 60 | /* XXX -- ssh doesn't use sa_len */ |
| 61 | ai->ai_addrlen = sizeof(struct sockaddr_in); |
| 62 | ai->ai_addr->sa_family = ai->ai_family = AF_INET; |
| 63 | ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port; |
| 64 | ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr; |
| 65 | return ai; |
| 66 | } else { |
| 67 | return NULL; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | int |
| 72 | getaddrinfo(hostname, servname, hints, res) |
| 73 | const char *hostname, *servname; |
| 74 | const struct addrinfo *hints; |
| 75 | struct addrinfo **res; |
| 76 | { |
| 77 | struct addrinfo *cur, *prev = NULL; |
| 78 | struct hostent *hp; |
| 79 | int i, port; |
| 80 | |
| 81 | if (servname) |
| 82 | port = htons(atoi(servname)); |
| 83 | else |
| 84 | port = 0; |
| 85 | if (hints && hints->ai_flags & AI_PASSIVE) |
| 86 | if (*res = malloc_ai(port, htonl(0x00000000))) |
| 87 | return 0; |
| 88 | else |
| 89 | return EAI_MEMORY; |
| 90 | if (!hostname) |
| 91 | if (*res = malloc_ai(port, htonl(0x7f000001))) |
| 92 | return 0; |
| 93 | else |
| 94 | return EAI_MEMORY; |
| 95 | if (inet_addr(hostname) != -1) |
| 96 | if (*res = malloc_ai(port, inet_addr(hostname))) |
| 97 | return 0; |
| 98 | else |
| 99 | return EAI_MEMORY; |
| 100 | if ((hp = gethostbyname(hostname)) && |
| 101 | hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) { |
| 102 | for (i = 0; hp->h_addr_list[i]; i++) |
| 103 | if (cur = malloc_ai(port, |
| 104 | ((struct in_addr *)hp->h_addr_list[i])->s_addr)) { |
| 105 | if (prev) |
| 106 | prev->ai_next = cur; |
| 107 | else |
| 108 | *res = cur; |
| 109 | prev = cur; |
| 110 | } else { |
| 111 | if (*res) |
| 112 | freeaddrinfo(*res); |
| 113 | return EAI_MEMORY; |
| 114 | } |
| 115 | return 0; |
| 116 | } |
| 117 | return EAI_NODATA; |
| 118 | } |
| 119 | #endif /* !HAVE_GETADDRINFO */ |
andersk / openssh.git / blame